With the 6300' gain to Baxter Pass, I think I would divide that up into two days. I would start the hike late afternoon and continue on into the night and gain several thousand feet, then camp by water. I see several stream crossings, and the third is about 2000' above the trail head, at maybe 8000'. I would think the climate and hike would be more pleasant from there on, to do on the second day.
